CO2 SELECTIVE CERAMIC MEMBRANE FOR WATER-GAS SHIFT REACTION WITH CONCOMITANT FOR THE RECOVERY OF CO2

In this quarter we focus on the membrane synthesis via interphase impregnation and slip casting. The slip casting method shows very promising. A well-organized hydrotalcite layer has been deposited on the porous ceramic substrate. Under SEM examination, few defects were recognized. In addition, its particle size in the range of {approx}500{angstrom} is comparable to our existing Al{sub 2}O{sub 3} membrane with 100{angstrom} pore size. This membrane could be qualified for post-treatment with CVD/I to seal the opening to become a CO{sub 2}-affinity membrane. On the other hand, the hydrotalcite membrane prepared via impregnation requires further refinement. After 4th impregnation defects in the range of 0.2 micron were observed under SEM examination, likely due to the incomplete coverage. In the next quarter, we will improve the in-situ technique to overcome this problem